A150 g ball and a 240 g ball are connected by a 33-cm-long, massless, rigid rod. the balls rotate about their center of mass at 150 rpm . part a what is the speed of the 150 g ball? express your answer to two significant figures and include the appropriate units

The speed of the 150 g ball rotating about its center mass is 3.2 m/s.

The given parameters;

The angular speed of the balls in radian per second;

The length of the second  mass is calculated as follows;

The speed of the 150 g ball is calculated as follows;

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v= 3.18 m/s

Explanation:

Given that

m= 150 g = 0.15 kg

M= 240 g = 0.24 kg

Angular speed ,ω = 150 rpm

The speed in rad/s

ω = 15.7 rad/s

The distance of center of mass from 150 g

r= 20.30 cm

The speed of the mass 150 g

v= ω r

v= 20.30 x 15.7 cm/s

v= 318.71 cm/s

v= 3.18 m/s

3. dark matter

empty space could also be a simple vacuum